Why do I feel like I'm having bizarre, other-worldly experiences, and how can I find guidance without being judged?

Why do some people mentally drain me even though they are nice? Is it because I’m depressed?
Is it harder for you to form a deep friendship with someone who only speaks one language?
Why might someone remain in a side relationship until they reach a certain age or want a family?
How can you tell if someone is having a mental breakdown if they look normal on the outside but are screaming for help inside?